Flush-valve.



PATENTED MAR. 27, 1906.

E. D. BARRETT. PLUSH VALVE.

APPLICATION FILED JULY 16. 1904.

2 SHEETS-SHEET 1.

INVENTOR Z'zweaifl. fiajil'el'i fin 019N578 WITNESSES.

No. 816,290. PATENTED MAR. 27, 1906.

E. D. BARRETT. FLUSH VALVE.

APPLICATION FILED JULY 16. 1904.

2 SHEETS-SHEET 2.

WITNESSES.

ATTORNEYS UNITED STATES PATENT OFFICE.

FLUSH- Specification of Letters Patent.

nnissunn Patented March 27, 1906.

Application filed July 16,1904. Serial No. 216,847- I To aZZ whom it may concern.-

Be it known that I, ERNEST D. BARRETT, a citizen of the United States, and a resident of Plainfield, in the county of Union and State of New Jersey, have invented a new and Improved Flush-Valve, of which the following is a full, clear, and exact description.

My invention relates to a valve which is capable of general use, but is especially appllcable to the use in flushing closets.

The principal object of my invention is to provide means for permitting a sudden rush of water through the valve when opened, whether the admission-pipe is the same size as the outlet-pipe or smaller, and to provide for the gradual closing of the valve, so that a constant stream Will pass throu h for some time without the necessity of olding the valve open.

Further objects of the invention will ap-' pear in the course of the subjoined description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the fig' ures.

Figure 1 is a side elevation showing a preferred form of my invention with parts in section; and Fig. 2 is a similar view, on an enlar ed scale, showing certain modifications.

n the form shown in Fig. 1 the valve-oasing is shown as consisting of two parts 11 and 12, each containing a chamber for the reception of water. These two parts are shown as being removably secured to ether; but they may be fastened in any ot er desired manner than the one shown and may be integral with each other, if desired. 13 is a feed-pipe, and 14 an outlet-pipe. 15 is a valve-seat provided for a valve 16. A second valve-seat 15 is provided below the valve-seat 15 and facing in the o posite direction, and a valve 16 is provi ed for coacting with this valve-seat. The two valves are provided with a hollow stem 17, which has a check-valve 18 at the bottom and is closed at the top 19. It is also rovided with a series of perforations 20, al of the same height, and roviding communication between the interlor of the stem and the chamber in the casing 11. v The two valves 16 and 16 are secured together by means of a skeleton framework 21, which depends from the valve 16 and supports the valve 16 at its bottom. At the'top of the skeleton frame are a series of triangular or other projections 22, designed for the pur ose of permitting the water to escape with ess impetus at the instant at which the valve is raised. The valve-stem 17 is not connected directly with the valves 16 and 16, but the latter are slidably mounted thereon, and a rojection 23 is formed upon the valve-stem or the purpose of coming into contact with a member secured to the valve or its frame, so that when the valve-stem is raised the first action will be to permit the stem alone to ascend and to expose the openings 20, so that water may pass through them from the chamber in the casin 11; but when the projection 23 strikes the e ement above mentioned it Will cause -the two valves and their frame to be raised. In Fig. 1 the element which the projection 23 strikes is the lower surface of the valve 16*; but in the form shown in Fig. 2 a collar 24 is provided, which is connected with the valve 16 and will operate in the same manner. A spring 25 is provided for normally holding t e valves down. 26 is a dash pot or cup secured near the bottom of the casing 12 in any desired manner or cast integrally therewith. Within this dash-pot a piston 27 is mounted, which is designed to reciprocate with the valve-stem -17 and is conse uently mounted thereon. 28 is a closure for the bottom of the casing 12, and when the dashpot is formed in a separate piece from the casing 12 this closure is designed to securely hold it in position. At the lower part of the dash-pot 26 it is provided with an opening 26, which is designed to be closed by a needle-valve 29, mounted on a screw 29*, which is designed to be operated back and forth to regulate the size of the passage for the exit of water from the dash-pot. The head of the screw may be covered by a cap 30 to protect it. Secured to the valve-stem 17 is a collar 31, connected by a link 32 to a ivoted lever 33. This lever, if desired, may e connected to the seat 34 or other operating device. The to of the casing 11 is closed by a ca 35, which has aframe 36 for the uidance of the valve-stem 17 and is provide with a packed cap 37 for securely closing the joint between it and a pipe 38, which is provided for connecting the chamber 11 with a tank 39. This tank is shown in Fig. 1 as being broken away and is preferably of considerable height. Near the top of it is a casing 40 for a floatvalve 41. This casing is provided with a cap 42, which has a valve-seat 43 and an outlet 44. This tank is designed to be used only when the inlet-pipe 13 is smaller than the outletpipe 14, in which case a check-valve 13 is employed in the pipe 13.

The operation of the device is as follows: YVater entering through the pipe 13 will not be impeded by the checlevalve 13 which works to permit water to pass upwardly through it and to prevent passage in the other direction. Supposing the valve 16 to be closed, the water will till the chamber 11 and the tank 39 up to the level of the inlet of the casing 40. it will then enter the latter and cause the valve 41 to float and be seated in an obvious manner. This will prevent the further exit of air through the opening 44 but more water can ilow into the tank on account of the compressibility of the air remaining therein above the inlet of the casing 40. On account of this arrangement water will pass through the check-valve 13" of the pipe 13 until the pressure of the water in the tank 39 is equivalent to the pressure upon the mains. The check-valve will then prevent a reduction of the pressure in the tank. It now the lever 33 is rocked upon its pivot by any means, the valve-stem 17 will be caused to rise through the instrumentality of the link and the collar 31. The first effect of this will be to force the openings 20 above the surface of the valve 16 without disturbing the latter. Pressure of the water upon the top of the valve 16 will be suflicient to keep the latter in closed position, because the only force acting to raise it would be the friction between the stem 17 and the valve. The exposure oi the openings 20 to the water in the casing 11 will permit the water to flow through the openings and down through the tube 17. The check-valve 18 is designed to open downwardly, so as to permit the water to flow through under the piston 27. Upon turning the lever 33 further around its p1vot the stem 17 will rise sullicientlyto cause the projection 23 to engage with the lower sur face of the valve 16 whole frame 21 and both valves upwardly, unseating the valve 16 and permitting the water in the casing 11 and tank 39 to .llow

through the frame 21 into the casing 12 and out through the pipe 14. This will be accomplished by the exertion of pressure on the seat 34. The complete closing of the seat will cause the valve 16 to be seated upon its seat 15. This will stop the ilow of water until the seat is raised, when the valve 16 will be caused to drop to a certain extent and permit water to again flow through the device as before. The pressure on the mains will cause additional water to be supplied immediately; but it will not flow fast enough to provide for the out-let of water through the pipe 14, and consequently the level of water in the tank 39 will be lowered. hen it is lowered below the casing 40, the float-valve 41 will drop and This will force the,

air will be admitted through the opening 44. Up to this time the pressure of the confined air above the casing 40 will assist the natural pressure of the water in causing a rapid flow.

The purpose of the dash-pot is to prevent the rapid closing of the valve 16 and to allow sufficient time to elapse to substantially empty the tank 39 and to provide for the necessary flow of water through the device. It will be obvious that as the only outlets from the dash pot 26 are through the openings 20 and 26, and that as the openings 20 will be.

closed by the valve 16 when the valve is forced upwardly by the projection 23 the flow of water from the dash-pot will be very slow. This flow will all pass through the opening 26 which is regulated by the screw 29 It will be obvious that as the piston 27 gradually descends in the dash-pot it will permit the valve-frame, which rests upon the projection 23, to descend with it, and when the valve 16 is seated the valve-stem 17 will beforeed to continue to descend by the spring 25, so that the openings 20 will be entirely closed and the piston 27 will assume its lowest possible position.

In the form shown in Fig. 2 the pipe 13 is shown as the same size as the pipe 14. Consequently the tank 39 and its accessories, as well as the check-valvc 13, maybe dispensed with. In place of the tank and of the cap 35 a plug 45 is provided for closing the top of the chamber 11.. In this form the two casings 11 and 12 are shown as integral. The construction of the valve 16 and collar 24 are shown in section in this figure; but it is to be'u nderstood that the collar 24 is somewhat modified. It necessarily contains a portion 24 projecting downwardly to come into contact with the projection 23 when the valve 16' is omitted, as is the case in the construction shown in this figure. The other parts shown in this figure are substantially the same as those shown in Fig. 1.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A flush-valve comprising avalve proper, a hollow stem having an open lower end pro vided with a check-valve and perforations through its walls, means for closing said pertorations, a piston rigidly attached to said valve-stem, and a dash-pot in which said piston is adapted to reciprocate.

2. A fiush-valve comprisinga valve proper, a hollow stem upon which said valve is slidably mounted, said stem having a closed upper end, an open lower end provided with a check-valve and intermediate perforations in its walls and provided with a projection, said projection being adapted to engage the valve and move it with the piston. I

3. A flush-valve comprising a hollowstem having a closed upper end, an open lower end and perforations in its walls, avalve slidinglv mounted on the stem and adapted to close all of said perforations and prevent the admission of water to the interior of said hollow valve-stem, a piston on the stem, and a dashpot in which said piston is adapted to move.

4. The combination of a hollow stem having a closed end, an 0 en end and perforations in its walls, a va ve slidingly mounted thereon, a piston attached to the valve-stem and movable independently of the valve, a dash-pot in which said piston is adapted to reciprocate, means for raising the valvestem, and means for causing the valve-stem to engage with the valve during a portion of its upward movement.

5. The combination of a valve-casing, a tank in communication with the upper part of said casing, means for feedin water to said tank, a valve located below the top of said tank and adapted to admit the passage of air therethrough, means for closing said valve when the height of the water in the tank reaches the level of the valve, a partition in said casing having valve-seats on opposite sides thereof, a valve-stem, two valvesmounted on said stem, a skeleton frame for connecting said valves, means inthe casing for forcing the upper valve toward its seat, a piston on said valvestem below the valves, a cup adapted to receive the iston, said cup having a passage in the wal thereof below the piston, a needle-valve for controlling the outlet of water through said passage, means for moving said valve-stem and piston.

6. The combination of a casing provided with two valve-seats, two valves, a frame, having passages in its walls and a central pas sage, for rigidl connecting said valves together, means i br forcing one of said valves toward its seat, a valve-stem connected with 'said valves, a piston on the valve-stem, a cup for ieceivin said piston and retarding the motion of t e latter, and means for forcing the piston into the cup and seating one of the valves.

7. The combination of a casing having a partition provided with a valve-seat on each side thereof, a valve-stem, a skeleton frame connected with said stem and having passages therethrough for water, two valves in said skeleton frame adapted to seat on the opposite sides of the valve-seat, a cup surrounding the valve-stem, and a piston on the valve-stem near the cup adapted to enter the cup, said cup having an adjustable outlet.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERNEST D. BARRETT.

Witnesses:

ALBERT E. FAY, EVERARD BoLToN MARSHALL. 

